STL → JAXSt Louis to Jacksonville

live

Direct flights from St Louis (STL) to Jacksonville (JAX): 7 nonstop departures observed each week across 1 airline. 86% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 2 minutes early. No cancellations were recorded across the 7 tracked flights. The nonstop covers 1,213 km, an estimated 2 hours 3 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Jacksonville. Updated 21 October 2026 at 20:18 UTC.

STL St Louis busy · +21
JAX Jacksonville smooth · +0
1,213 km · ~2h 03m est.
dep bank 10:15–19:557x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
86% on time

of the last 7 operated STL → JAX flights arrived within 15 minutes

Median arrival delay is −2 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−2 minacross the last 7 operated legs
Flight time~2h 03mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Southwest AirlinesWN86% on time

Flights WN3427 10:15 Su · WN4301 10:15 Sa · WN2812 10:20 Tu We · WN4973 varies Mo Th Fr Sa Su

History

operated legs · board outcomes
10-21WN2812dep +12 → arr−12
10-19WN4973dep +10 → arr−23
10-18WN3427dep +29 → arr+4
10-18WN4973dep +21 → arr−2
10-17WN4301dep +17 → arr−8
10-17WN4973dep +46 → arr+19
10-16WN4973dep +24 → arr+4

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
STLSt Louis +21 min busy 🌤 clear · SW 3 kt Full STL delay board →
JAXJacksonville +0 min smooth 🌤 clear · N 0 kt Full JAX delay board →

Weather lens

Current conditions put the pressure at STL and JAX: 45% odds of a 15+ minute delay and around +10 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the St Louis to Jacksonville route actually runs

Pro Flight Search records official board updates for nonstop STL to JAX flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — St Louis (STL) to Jacksonville (JAX) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/STL-JAX
How we measure this →

STL to JAX questions

Is STL–JAX running on time right now?

Smooth skies ahead. The departure side at STL is the weaker end, route health score 86/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on STL–JAX?

Operators schedule morning departures around 10:15 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the JAX delay card to confirm conditions when you'd arrive.

How long is the flight from STL to JAX?

Great-circle distance is 1,213 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 116–134 min gate-to-gate on this route.

How often does STL–JAX fly?

Southwest Airlines runs the route with about 9 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.